Are there nonstop flights from Ölgii (ULG) to Ulaanbaatar (UBN)?

Yes. MIAT Mongolian Airlines, Hunnu Air fly this route. Flight time is about 1h 59m.

Ölgii → Ulaanbaatar

Ölgii Mongolei International Airport (ULG) to Ulaanbaatar Chinggis Khaan International Airport (UBN)・1,256 km

Nonstop flights available (2 airlines). Flight time about 1h 59m. Nonstop return flights also operate.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.